import { OpenAPIHandler } from '@orpc/openapi/fetch'
import { OpenAPIReferencePlugin } from '@orpc/openapi/plugins'
import { ORPCError, onError, ValidationError } from '@orpc/server'
import { ZodToJsonSchemaConverter } from '@orpc/zod/zod4'
import { createFileRoute } from '@tanstack/react-router'
import { z } from 'zod'
import { name, version } from '#server/../package.json'
import { router } from '@/server/api/routers'

const handler = new OpenAPIHandler(router, {
  plugins: [
    new OpenAPIReferencePlugin({
      docsProvider: 'scalar',
      schemaConverters: [new ZodToJsonSchemaConverter()],
      specGenerateOptions: {
        info: {
          title: name,
          version,
        },
        components: {
          securitySchemes: {
            bearerAuth: {
              type: 'http',
              scheme: 'bearer',
            },
          },
        },
      },
      docsPath: '/docs',
      specPath: '/spec.json',
    }),
  ],
  interceptors: [
    onError((error) => {
      console.error(error)
    }),
  ],
  clientInterceptors: [
    onError((error) => {
      if (
        error instanceof ORPCError &&
        error.code === 'BAD_REQUEST' &&
        error.cause instanceof ValidationError
      ) {
        // If you only use Zod you can safely cast to ZodIssue[]
        const zodError = new z.ZodError(
          error.cause.issues as z.core.$ZodIssue[],
        )

        throw new ORPCError('INPUT_VALIDATION_FAILED', {
          status: 422,
          message: z.prettifyError(zodError),
          data: z.flattenError(zodError),
          cause: error.cause,
        })
      }

      if (
        error instanceof ORPCError &&
        error.code === 'INTERNAL_SERVER_ERROR' &&
        error.cause instanceof ValidationError
      ) {
        throw new ORPCError('OUTPUT_VALIDATION_FAILED', {
          cause: error.cause,
        })
      }
    }),
  ],
})

export const Route = createFileRoute('/api/$')({
  server: {
    handlers: {
      ANY: async ({ request }) => {
        const { response } = await handler.handle(request, {
          prefix: '/api',
          context: {
            headers: request.headers,
          },
        })

        return response ?? new Response('Not Found', { status: 404 })
      },
    },
  },
})